| 摘要 |
<p>A charge injection assistant a trace of which is added to a functional layer such as a light-emitting layer of an electroluminescence device to improve the charge injection property of the device, and an organic electroluminescence device which contains this charge injection assistant, whose applied voltage is low, which operates with a high light-emission efficiency, and has a long service life. The assistant is used for organic electronic devices in which positive holes are injected into an organic functional layer for transferring positive holes from outside this functional layer, and is made of a stilbene derivative, a distyrylarylene derivative or a tristyrylarylene derivative. In the organic electroluminescence device containing the charge injection assistant described above, the ionization energy of this charge injection assistant is lower than that of the light emitting layer.</p> |
